Film-developing device



w. A. AND J. HAMMOND. M. HAMMOND, ADMINISTRATRIX OF W. A- HAMMOND, DEC'D.

FILM DEVELOPING DEVICE.

APPLlCATlON FILED FEB. 27,1918- 1,347,032. a nt d uly 20,1920.

2 SHEETS-SHEET 1- FJQ c" HW/E/VTUI? FIAT j 14 A.HAMMl7A/17 IL HAMMUND By m 1. @mdau ATTORNEY W. A. AND J. HAMMOND. M. HAMMOND, ADMINISTRATRIX 0F w. A. HAMMOND, DECD.

FILM DEVELOPING DEVICE.

APPLICATION FILED FEB. 27. 1918.

Patented July 20, 1920.

2 SHEETS-SHEET 2.

M/VENTUR 112' A. 10111114011111 1i. 157111110317 A TTORA/[Y v a film-developin uulrso s1--. vr1-:s

Application filed'I'cbruary 27, 1918. Serial films may be properly and rapidly developed without the use of a dark room.

Another object of the invention is the pro-.

duction of an .improved means whereby the time required for developing photographic films is reduced to the minimum.

Still another object of the invention is the production of a film-developing device particularly adapted for roll films.

" Furthermore, the invention contemplates device embodying certain ed features of construction novel and simpl whereby its size and cost of production is redescribed the duced to the creased. e

With these and other objects in view, the invention, consisting in the construction, combination and novelarrangement of parts, will be fully understood from the following description; reference being had to the accompanyin drawings, which form a part of this app ication and in which like characters ofreference indicate corresponding parts throughout the several views, of which':- v

Figure 1 is a plan of a device constructed in accordance with the invention, a portion being cut away;

Figs. 2 and 3 are opposite side elevations, parts being cut away and shown in sectlon;

Fig. 1 is a front elevation of the same, parts being cut away and shown in sectlon; and

Fig. 5 is a perspective view of the reel latch.

While we have illustrated and hereinafter preferred .embodiment of the invention, we would not be. understood as bein limited to the specific structure chosen for i lustration, for various alterations'and modifications in the details of construction and arrangement of parts, may be made without departing from the spirit and scope Specification 6: Letters Patent.

nvented certain new and useminimum and the efliciency inof the invention as defined in the appended claims.

The invention contemplates, broadly, a structure including a developing-fluid container which inc'lo'ses a rotatable reel mechamsm. The container is provided with an opening adjacent which is a fil which normally closes theropening and yet permits the film to pass through the opemng be wound upon the reel mechanism, carrying the film through the developing fluid,

all of which will presently be made clear.

n advantageous embodiment of our invention consists of a cylindrical case, 6,

mounted on a suitable support, 7 and adapted to contain developing fluid. The case may be provided with a suitable! drain- 0 ening, 8, normally closed'by a plug, 9.

xtending coaxially through the case'is a shaft, 10, journaled in suitable bearings, 11,

in the side walls of the case. the shaft is provided The case incloses a At one end with a crank, 12. 5 drum, 13, which rotates PATENT era-1on Patented July 20,1920.

m receptacle freely on the shaft, 10, and within the drum, 13, is mounted a second drum, 14, fixed on the shaft, 10. The side walls of .tlie-drum, 13, are pervious or cut away as at 15, to permit passage of the fluid betweenthe drums.

he drum, 13, is wardly-extending part as the lug, 16, engageable by a tappet, 17, onthe drum, 14:, whereby rotation of the shaft in one direction causes the drums to turn in unison while rotation in the opposite direction causes the drum, 14, to rotate independently of its companion. The periphery of thecase is provided with a transverse slot, 18, and adjacent the said opening is hinged a concavo-convex case, 19, which serves as a film receptacle and also as a closure for the 0 ing, 18. The case, 19, is provided with end walls, 20, which, when the receptacle is closed over the opening, fit closely between flanges, 21, on the case to facilitate exclu sion of light from the opening. 22 is a plate which slides on the periphery of the case toward and from the opening under'suitable guides, 23, mounted on the case.

The periphery of the drum,- 13, is provided with a transverse slot, 24, which registers with the slot, 18, when the said drum is in normal position. The drum, 13, is releasably locked in normal position by any preferred means.

pen.-

In the present embodiment we provide for this purpose an elongated strip, 25, pivthe adjacent wal position the latch may be retained by slight lateral movement to engage a notched part,

31 of the arm with the wall of the case.

The crank, 12, serves as an indicator which registers with a character, 32, on the wall of the ease to indicate that the opening, 29,-in the wall of the drum, 13, is in position to receive the latch member, 27.

To operate the embodiment illustrated, developing fluid is first introduced into the case through the opening, 18. The drums are then brought to the positions indicated in Fig. 2, by turning the crank counterclockwise, bringing the tappet into engagement with the stud, 16, and continuing rotation until the indicator registers with the character, 32. The latch, 25, is then released to enga e the outer drum. The crank is then turned clockwise until the tappet, 17, engages the opposite side of the stud, 16. The film roll, which usuall consists of the film strip, 33, wound in a r0 1 together with a protecting strip of paper, 34, is then placed in the film rece tacle and the ends of the strips introduce through the slots, 18, and 24:, of the case and outer drum, respectively, and inserted under a strip, 35, mounted on the inner drum and adapted to hold the film end.

Obviously the film engaging member, 35, and the tappet, 17, should be so related that when the latter is in engagement with the stud, 16, the former will be accessible through the openings of the case and outer drum. The plate, 22, is then slid over to reduce the size of the slot, 18, and serves as a support for the film-roll, when the film receptacle, 19, is closed as shown in dotted lines in Fig. 2. v

The inner drum is then. turned clockwise until the film is artially wound thereon.

The latch, 25, is t en disengaged from the drum, 13, whereupon the remainder of the film is wound upon the outer drum as shownv in Fig. 3.

flotation of the drum is then continued until the developin prooess'is complete. The film is then rea ily removed by withdrawing its end from the case-until the film is removed from the outer drum, then locking the outer drum against rotation while withdrawing the remainder of the film from the inner drum.

Having thus described our invention,

what we claim as new and desire to secure by Letters Patent, is

' 1. A film-developing device comprising a developing-fluid container, reel mechanism rotatable therewithin, the container having a film passa e, a case hinged to the container to open an close the assage, and adapted to rotatably inclose a film roll, and film-engaging means on the reel mechanism, whereby the film may be wound from the case onto the reel mechanism.

2. A film-developing device comprising a developing-fluidcontainer, reel mechanism rotatable therewithin, .the container having a film passage, a case pivoted on the container to openand close the assage and adapted to inclose a film roll, fi -en aging means on the reel mechanism where y the film may be wound from the case onto the reel mechanism, and a plate mounted on the container to reduce the size of the passage.

3. A film-developin device comprising a cylindrical horizpntal -disposed developing-fluid container, reel mechanism rotatable therewithin, the container having a peripheral film-receiving opening, a concavo-con' vex cover hinged to the container to open and close said opening and adapted to rotatably inclose a film roll, and film-en aging means on the reel mechanism, where y the film may be wound from the cover onto the reel mechanism.

4. A film-developin device comprising a a film-engaging drumfixed on the shaft, 2.

second drum rotatable outside said first drum, said container and second drum having openings through which a film may be engaged with the first drum, coacting parts on the drums to cause the drums to rotate in unison, and an indicating arm on the shaft to indicate the relative positions of the openlngs.

6. A film-developing device comprising a fluid container, inner and outer drums V therewithin, film-engaging means on' the inner drum, the outer drum and container having openings through which a film may be passed to be engaged by said means, means for rotating the inner drum and subsequently rotating the drums in unison, and a latch for releasably locking the outer drum, including an elongated strip mounted on the container to move inwardly said part, said part being disengageable from the shoulder by moving the strip outwardly.

7. A film-developing device comprising-a fluid container, inner and outer drums therewithin, film-engaging means on the inner drum, the outer drum and container having openings throu h which a film may be passed, y saidmeans, means for roto be engaged tating the inner drum and subsequently rotating the drums in unison, and a latch including a strip pivoted on the container to move laterally, a free end of the strip being yieldable outwardly and provided with an inwardly-extending laterally-shouldered. part, the containerhaving an opening to receive said part, and the end of the outer drum having a recess to receive said part, the shoulder of said part being engageable with the container wall when the strip is moved laterally to hold the part from the recess.

8. A film-developing device comprising a fluid container, outer and inner film-winding drums within the container, means for rotating the inner drum a distance and subsequently rotating both drums in unison,

and a latch to releasably hold the outer drum against rotation, including an elongated strip on the container, yieldable outwardly and having an inwardly-extending shouldered part, the container having an openmg to receive said part, and the outer drum having a recess to recelve said part, said shouldered part being engageable with the container wall when the strip is moved outwardly, to hold said part from the recess.

9. A film-developing device comprising a developing-fluid container, a pervious drum rotatable therein, a second drum rotatable within said first drum, film-engaging means on said second drum, the container and said first drum having openings, a case on the container adapted to inclose a roll-film and cover the opening of the container, said openings and means being so related as to register when said drums are in normal position whereby the film end may be introduced through the openings and engaged with said means, means for rotating said second drum to wind a portion of the film thereon, and means for subsequentlyrotating both drums,

7 whereby the remainder of the film is wound on said first drum.

In testimony whereof we have hereunto set our hands this 4th day of Febn, 1918.

I, WINSLOW A. HAMMOND. JAMES HAMMOND. 

